Water-drainer and pop safety-valve



(No Model.) 2 Sheets-Sheet 1.

G. PARENT. WATER DRAINER AND POP SAFETY VALVE.

No. 399,070. Patented Mar, 5, 1889.

WHLEEEES. IEP/Egktll.

%M%M f m' N. PU'ERS, Hmk l tbographrv. Walhinglwl. n. c

2 Sheets-Sheet 2.

(No Model.)

0. PARENT.

WATER DRAINER AND POP SAFETY VALVE. No. 399,070. Patented Mar 5,, 1889.,

N. PETERS. i'hcloulw rn mr, ,wmlm mm ac.

UNTTED dramas Aren't @rincn,

CHARLES PARENT, OF BOSTON, MASSAUHUSETTS.

WATER-'DRAINER AND POP SAFETY-=VALVE.

SPECIFICATION forming part of Letters Patent No. 399,070, dated March 5, 1889.

Application filed October 17, 1888.

To all whom it may concern:

Be it known that I, CHARLES PARENT, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and use 1 ful Improvement in \Vater-Drainers and Pop Safety-Valves, of which the following is a specification,reference being had to the accompan yin g drawings.

My device is especially intended for use with automatic compressed-air brakes. In the practical operation of the automatic compressed-air brakes in common use more or;

less condensed steam passes from the pump into' the main reservoir in which the conr pressed air is stored, where it gradually accumulates, thus diminishing the air-space in the reservoir and interfering with the efficiency of' the brake, as well as being in part carried along by the moving column of air into the main pipe and brake-valve, cloggin g its action. In cold weather this difficulty is aggravated by the water freezing. These accumulations in the reservoir are sometimes drawn out through a hole in the bottom of the reservoir, and various other devices have been used with more or less success to relieve from these obstructions.

' The object of my invention is to provide an automatic drainer for attachment to the reservoir, by means of which the water will be removed, thus preventing accumulation in the reservoir and the passage of the same into the brakevalve or pipe; also to provide means of heating the drainer to prevent freezing. My device can also be used simply as a safetyvalve.

My invention consists of a head with an orifice opening on one side into the reservoir or boiler, a valve to control the outlet, a springseated thimble shutting over the neck of the out-let and forming aseat for the valve-stem, and provided with ports which are closed by a sliding sleeve outside the thimble, the sleeve being seated on a spring, the thimble also be ing provided with a small vent which is so proportioned to the spring that when the pressure reaches a certain degree beyond the 1 the small vent the thimble and capacity of sleeve will each be forced back upon their spring-seats and open the larger ports; also in the method of heating the drainer to prevent freezing.

Eerial No. 288,400. (No model.)

i I In the drawings, Figure l is a side view of g the main reservoir of an air-brake with one of mydrainers attached. Fig. 2 is a longitudinal section of my device with the valve I closed and a portion of the reservoir broken away. Fig. 3 is a similar section with the valve open. Fig. l-is a cross-section through the head.

The head A is a hub-like block cored out through the middle, and having a chamber, (1, within its walls and a port, a, leading from the chamber a, connected with pipe a through i which steam is conducted. to the chamber a, for the purpose of heating the head during cold weather to prevent freezing. Exhaustl steam from the pump is the preferable source 4 of supply. The pin-holes a leadin g from the chamber (1, allow the passage of steam up against the main reservoir 0, to prevent the moisture in the reservoir from freezing.

\Vhile the method of heating which I have described is, in my judgment, the preferable one, steam maybe supplied from any source; and instead of conducting it into a chamber in the head it may be applied as a jet to the outside surface.

The shank (c -on the upper end of the head is screwed into the reservoir J. The strainer S over the mouth of the shank prevents passage into the drainer of large particles which might clog the valve. The wings b of valve B fit in chamber c inside the head A, the valve B being seated on the shoulder a when the valve is closed, and the stem 1) projecting somewhat beyond the neck a. The stem 1) is preferably adjustable in length, as shown, by making it screw into a socket in the valve. The thimble 1) fits snugly over the neck a, the ringpaeking e forming a tight joint. A depression in the base (1 of the thimble forms a seat for the end of the valve-stem Z1 The sleeve F fits snugly outside the thimble, yet free to slide, and is seated upon a spiral spring, G, which lies in a groove, g, on the face of the head A. The chamber formed by thimble D, sleeve F, and neck a is air-tight when the valve is closed, except for the pin holes (1 in the wall of the thimble. The side wall of the thimble l) extends beyond the bottom (1, forming a cup, D, in which is a coil spring, 11. The cap I. goes loosely over the l sleeve F, and screws down upon a lip on head A and has outlet-holes Z. The lower end of sleeve F has its inner edge beveled, and is seated upon a shoulder, Z, on the inside of cap L. Cup D fits closely into cap L inside of shoulder I, so that the chamber formed by cup D, sleeve F, and cap L is a perfectly tight compartment for spring H to protect it from moisture, except the air-hole l in the end of the cap,which acts as a vent when the spring is compressed. The cup D maybe dispensed with, as it is not essential, the spring resting on base (I, and being kept from slipping by set-screw M. The base (Z will then extend up inside the shoulder Z to form a tight chamber for spring H, the same as when cup D is used. This feature of the close chamber to protect the spring may be applied to safety-valves in common use. In the end of cap L is a setserew, M, which presses upon the spring H, and by means of check-nut m regulates its tension. The spring H thus forms a springseat for thimble D. The stem m on the end of set-screw M extends through coilspring H, so that it by accident the spring becomes broken the stem m can be screwed up to bear upon the top (I of cup D to hold the valve 13 tight on its seat. The cap N envelops the whole for protection and has outlet-holes n.

The drainer is preferably attached to the underside of the main reservoir 0, although it will work in any position. hen the pressure in the main reservoir is less than the pressure to which the spring II is adjusted, the valve B will remain closed. \Vhenthe pressure exceeds this, the valve will partially open, allowing the compressed air, together with the water in the bottom of the reservoir, to pass by the valve into thimble D, and thence through the small, pin-holes d in. the wall of the thimble out into the grooved passage formed by the beveled edge of sleeve F, thimble D, and shoulder Z, thence through notches f into cap L. Then the pressure is greater than can find vent through pin-holes d, the valve will open further, and the stem 1), pressing upon its seat, will push the thim ble'down on its spring-seat H, opening ports (1 As soon as the ports (I begin to open, the pressure upon the beveled edge of sleeve F becomes so great as to push the sleeve back, compressing spring G, upon which it is seated, and thus allowing free passage through ports (2 Cap L is provided with vent-holes Z for readyescape of all that comes into it. When thepressure becomes reduced below that to which the valve and, spring are adjusted, sleeve F will close ports d and the valve will automatically close until the pressure again rises.

hat I claim as my invention is 1. An automatic water-drainer and pop safety-valve, consisting of a head, A, adapted to be attached to a reservoir or boiler, an orifice through the head opening on one side into-the reservoir, a valve, B, controlling the outlet, a spring-seated thimble shutting over the outlet and forming a seat for the valve is seated that when the pressure reaches a' certain degree beyond the capacity of the vent the valve will open further, forcing the thimble back on its spring-seat and partially opening the larger ports, diwhen the increased pressure thereby brought against the beveled rim of the sleeve will force the sleeve back upon its spring-seat, opening wide the ports, substantially as described.

2. An automatic water-drainer and pop safety-valve, consisting of a head, A, adapted to be attached to a reservoir or boiler, a chamber, a, within the head, and a port, a, through which steam may be admitted to heat the head, an orifice through the head opening on one side into the reservoir, a valve, B, controlling the outlet, a spring-seated thimble shutting over the outlet and forming a seat for the valve-stem, the thimble being provided with ports which are closed by a sliding sleeve outside the thimble, the sleeve being seated upon a spring, a cap, L, covering the thimble and sleeve and secured to the head and provided with ports, the thimble being also provided with a small vent, d, leading into a grooved passage formed by the thimble, the beveled edge of the sleeve andthe shoulderon which the edge of the sleeve is seated, the beveled edge of the sleeve having a small vent leading from the groovedpassage into the cap L, the small vents being so proportioned to the pressure of the 'springon which the thimble is seated that when the pressure reaches a certain degree beyond the; capacity of the small vent the valve will open further, forcing the thimble back on its springseat and partially opening the larger ports, 61 when the increased pressure thereby brought against the beveled edge of the sleeve will force the sleeve back upon its spring-seat, opening wide the ports d substantially as described.

3. An automatic water-drainer and, safetyvalve, consisting of a head, A, adapted to be attached to a reservoir or boiler, an orifice through the head opening on one side into the reservoir, a valve, 13, controlling the outlet, a spring-seated thimble, D, shutting over the outlet and forming a seat for the valvestem, the thimble being provided with ports which are closed by a sliding sleeve, F, out side the thimble, the sleeve being seated upon a spring, G, a cap covering the thimble and sleeve and secured to the head and, provided with ports, the cap L, having in its end asetscrew, M, to regulate the tension of -the spring- H and to hold the thiinble on its seat in case the spring is broken, the thimble being also provided with a small vent, cl, leading into a grooved passage formed by the th'nnble, the beveled edge of the sleeve, and the shoulder on which the sleeve is seated, the beveled edge of the sleeve having a small vent leading from the grooved passage into the cap L, the small vents being so proportioned to the pressure of the spring on which the thiinble is seated that when the pressure exceeds the capacity of the small vent the valve will open further, forcing the thiinble back on its spring seat and partially opening the larger ports, (1 when the increased pressure thereby brought- 1 against the beveled rim of the sleeve Will force the sleeve back upon its spring-seat,

opening wide the ports, substantially as de- 

